linux-kernel - Re: [PATCH v8 19/23] dt-bindings: crypto: meson: support new SoC's

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Message-ID: <20240708103640.g62urznl37jltcvk@cab-wsm-0029881.sigma.sbrf.ru>
Date: Mon, 8 Jul 2024 10:36:45 +0000
From: Alexey Romanov <avromanov@...utedevices.com>
To: Rob Herring <robh@...nel.org>
CC: "neil.armstrong@...aro.org" <neil.armstrong@...aro.org>,
	"clabbe@...libre.com" <clabbe@...libre.com>, "herbert@...dor.apana.org.au"
	<herbert@...dor.apana.org.au>, "davem@...emloft.net" <davem@...emloft.net>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>, "khilman@...libre.com"
	<khilman@...libre.com>, "jbrunet@...libre.com" <jbrunet@...libre.com>,
	"martin.blumenstingl@...glemail.com" <martin.blumenstingl@...glemail.com>,
	"vadim.fedorenko@...ux.dev" <vadim.fedorenko@...ux.dev>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	"linux-amlogic@...ts.infradead.org" <linux-amlogic@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, kernel <kernel@...rdevices.ru>
Subject: Re: [PATCH v8 19/23] dt-bindings: crypto: meson: support new SoC's

Hello Rob,

On Mon, Jun 10, 2024 at 04:32:19PM -0600, Rob Herring wrote:
> On Fri, Jun 07, 2024 at 05:12:38PM +0300, Alexey Romanov wrote:
> > Now crypto module available at G12A/G12B/S4/A1/SM1/AXG.
> > 
> > 1. Add new compatibles:
> >   - amlogic,g12a-crypto
> >   - amlogic,axg-crypto
> >   - amlogic,a1-crypto
> >   - amlogic,s4-crypto (uses a1-crypto as fallback)
> > 
> > Difference between this compatibles:
> >  * Different registers offset and the number of setup descriptors.
> >  * GXL doesn't support hashing like the others.
> >  * G12A/B and A1/S4 crypto HW don't support 192 AES key.
> >  * GXL, G12A/B and AXG require a reverse IV key before processing.
> > 
> > 2. Add power-domains in schema, which is required only for A1.
> 
> You added it in the prior patch, was that supposed to be done here? Kind 
> of strange for h/w to optionally have a power-domain... It either has 
> one or it doesn't. OTOH, making required is an ABI break.

This is vendor design. In old SoC's power domain for crypto HW
was not configurable, but in A1-series it is configurable.

> 
> > 
> > Signed-off-by: Alexey Romanov <avromanov@...utedevices.com>
> > ---
> >  .../bindings/crypto/amlogic,gxl-crypto.yaml   | 21 +++++++++++++++++--
> >  1 file changed, 19 insertions(+), 2 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/crypto/amlogic,gxl-crypto.yaml b/Documentation/devicetree/bindings/crypto/amlogic,gxl-crypto.yaml
> > index aff6f3234dc9..a8344de71b4a 100644
> > --- a/Documentation/devicetree/bindings/crypto/amlogic,gxl-crypto.yaml
> > +++ b/Documentation/devicetree/bindings/crypto/amlogic,gxl-crypto.yaml
> > @@ -11,8 +11,16 @@ maintainers:
> >  
> >  properties:
> >    compatible:
> > -    items:
> > -      - const: amlogic,gxl-crypto
> > +    oneOf:
> > +      - items:
> > +          - enum:
> > +              - amlogic,s4-crypto
> > +          - const: amlogic,a1-crypto
> > +      - enum:
> > +          - amlogic,gxl-crypto
> > +          - amlogic,axg-crypto
> > +          - amlogic,g12a-crypto
> > +          - amlogic,a1-crypto
> >  
> >    reg:
> >      maxItems: 1
> > @@ -37,6 +45,15 @@ required:
> >    - clocks
> >    - clock-names
> >  
> > +allOf:
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          const: amlogic,a1-crypto
> > +    then:
> > +      required:
> > +        - power-domains
> > +
> >  additionalProperties: false
> >  
> >  examples:
> > -- 
> > 2.34.1
> > 

-- 
Thank you,
Alexey